This chapter focuses on the discipline of digital forensics. It examines the history of how criminals have been early adopters of technology to further their criminal trade craft. The chapter examines specific technologies that have either been used or targeted by cyber criminals. It also focuses on the main technologies that seem to have had the biggest impact. The chapter also looks at what impact the use of tools has on those investigating computer crimes, as various automated tools are now becoming a standard part of this forensic discipline. The Internet of Things (IoT) is the near future target for cyber criminals. Digital forensics is defined as "A sub-discipline of Digital & Multimedia Evidence, which involves the scientific examination, analysis, and/or evaluation of digital evidence in legal matters". Society has greatly benefitted from the advances in technology. The Internet has arguably changed the very fabric of the people society.